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Fencer Vulns
high 7.5

CVE-2022-34035 json

HTMLDoc v1.9.12 and below was discovered to contain a heap overflow via e_node htmldoc/htmldoc/html.cxx:588.

published 2022-07-18 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-37067

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits
0
none known

Summary

HTMLDoc v1.9.12 and below was discovered to contain a heap overflow via e_node htmldoc/htmldoc/html.cxx:588.

Patch / fix

  • htmldoc Debian 14, Debian 13, Debian 12 1.9.12-1

debian advisories DEBIAN-CVE-2022-34035

  • htmldoc Ubuntu Pro 14.04 LTS 1.8.27-8ubuntu1+esm4
  • htmldoc Ubuntu Pro 16.04 LTS 1.8.27-8ubuntu1.1+esm3
  • htmldoc Ubuntu Pro 18.04 LTS 1.9.2-1ubuntu0.2+esm2
  • htmldoc Ubuntu Pro 20.04 LTS 1.9.7-1ubuntu0.3+esm2

ubuntu advisories UBUNTU-CVE-2022-34035

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-34035 updated cvss 5.3

htmldoc: heap overflow via e_node htmldoc/htmldoc/html.cxx

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.70% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/michaelrsweet/htmldoc/issues/426 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.